Method and apparatus for incinerating refuse material



' March 7, 1967 J. A. BOYD ET AL METHOD AND APPARATUS FOR INCINERATINGREFUSE MATERIAL Filed June 1, 1965 '7 Sheets-Sheet 1 Jehn A.

yd Donald. E. Boyd.

iflwniors [W -mars 7, we?v .J. A. BOYD ET AL METHOD AND APPARATUS FORINCINERATING REFUSE MATERIAL Filed June 1, 1965 '7 Sheets-$heet 2 JohnDormai E Mrch'i, 1967 j YD ETAL 7 3,307,507

METHOD AND APPARATUS FOR INCINERATING REFUSE MATERIAL Filed June 1, 1965A 7 Sheets-Sheet s arch 7, 1967 J.'A.'BOYD ETAL 3 METHOD AND APPARATUSFOR INCINERATING REFUSE I'VWI'ERIAL Filed June 1, 1965 'r Sheets-Sheet 4duhn oyd I Donaid E. 8W6

' INVENTORS March 7, 1967' J. A. BOYD ET AL METHOD AND APPARATUS FORINCINERAT ING REFUSE MATERIAL Filed June l 1965 7 Sheets-Sheet 5ATTORNEYS.

March 7, 1967 J. A. BOYD ETAL 3,307,507

METHOD AND APPARATUS FOR INCINERATING REFUSE MATERIAL Filed June 1, 1965v 7 Sheets-Sheet 6 John A. Boyd Donald E. Boyd INVENTORS N m 9W4 2 9m,

Q N ATTORNEYS March 7, 1967 J. A. BOYD ET A 3,307,507

METHOD AND APPARATUS FOR INCINERATING REFUSE MATERIAL Filed June l, 19657 Sheets-Sheet 7 i F} ii I i g I l I .230 I v 7 l I I 1 r; I I 1 l l I285 23a F56 I3 284 Jehn A. oyd Donald E. Boyd INVENTCRS ATTOBN EYSUnited States Patent METHOD AND APPARATUS FOR INCINERATING REFUSEMATERIAL John A. Boyd, 1310 Halloman Road, and Donald Everett 318University Drive, both 'of'Fairfax, Va.

Filed June 1, 1965, Ser. No. 460,389

22 Claims. (Cl. 110-8) This application is a continuation-in-part ,ofour co- Various types of incinerators have previously been developed,and generally, they have proved satisfactory for use in conventionalgarbage collection, and inthose instances where small amounts or loadsof material are deposited into the incineratorfor burning. However, withthe general movement of family living into the suburbs,- the increaseduse of parkareas, and the recent municipal programs of trash collection,there has been a growing need for a mobile incinerator which is capableof burning large amounts of combustible material while the incineratoris moved from place to place during adays schedule. I

With mobile incineration of garbage and. refusemate rials, it isnecessary that rthe incinerator completely burn the material depositedtherein, so that smoke and undesirable odors are not exhausted into theatmosphere.v It is likewise necessary that the garbage and ohermaterials deposited into a mobile incinerator be sufliciently .bur'nedso that the incinerator may be moved about and reloaded while it issimultaneously reducingthe previous load to ash and combustion gases.

In the conventional community method of trash collection anddisposal,stores, residences, and the-like, dispose.

of their trash and garbage in barrels or garbagecans,

Then, a garbage collection crew empties such barrels and cans into atruck which transports the same to dump or an incinerator. Naturally, agreat amount of time, effort; manpower, and expense are involved inconducting and maintaining such services on a weekly basis and it thuswould appear to be highly beneficial to provide some method and meansfor incinerating the garbage and trash as it is collected. The presentinvention accomplishes this beneficial result and thus reduces greatly,the number of collection trucks needed, the need for dead-heading, i.e.,driving empty trucks along a route, and the size requirements forcommunity dumps and incinerators.

In addition to the community collection procedure discussed above, thereis also the need for trash and garbage collection in recreation areassuch as parks, beaches, zoos, golf courses, trailer camps, refreshmentstands, camping areas, and the like. Many of these areas are notadequately serviced by a city garbage collection crew, and consequently,the problem of collecting trash and garbage from these areas is evenmore acute. Moreover, since these areas are often densely wooded, trashmust be transported a considerable distance before it can be burned. Thepresent invention not only facilitates col-' lection of garbage andtrash at such recreation areas, by virtue of its trans-portability, butadditionally, assures that such trash can be incinerated on site,regardless of the wooded nature of such site. s r

Accordingly, one of the primary objects of the'present invention is theprovision of a mobile incinerator of the type capable of completelyburning'refuse material so as to eliminate undesirable odors andexcessive smoke exhaust therefrom. Another primary object of the present3,307,507 Patented Mar. 7, 1967 invention is the provision of a methodof burning and filtering combustible components entrained in an exhaustgas flow from an initial combustion within a movable incinerator. I

A further object of the present invention is to provide an improvedmobile destructor incinerator for burning garbage or similar combustiblematerial within a combustion area and providing suflicient space withinthe mobile incinerator for the accumulation of burnt fly-ash so thatsuccessive loading and burning operations may be carried out withoutnecessitating excessive dumping of the ashes produced by burning.

Another objectof the present invention is to provide a method of burningcombustible material within a combustion area 'and directing the exhaustgases produced therefrom into separate gas streams flowing alon gprescribed paths through a plurality of chambers so as to reduce theamount of smoke and undesirable odor-s therein. A still further objectof the present invention is to provide a method of combustion, whichmethod includes the steps of burning, cooling exhaust gases, re-burningthe gases and directing the same over a liquid so as to re movesubstantially all solid material therefrom before discharge into theatmosphere. -In this regard, it is a further specific object hereof toprovide a plurality of chambers within an inner casing so as to carryout the prescribed methods of operation referred to herein.

A still further significant specific object of the present invention isto provide a 'method and apparatus of burning combustible materialWithin a primary combustion 1'; area and exhausting combustion gasestherefrom into a" secondary combustion area. More particularly, it is aspecific object of the present invention to provide such a method andapparatus which incorporates various deflection devices for directingcombustion gasesina plurality of turbulent paths and through variouschambers within a mobile destructor incinerator.

Aside from the foregoing more basic generaland specific objects of theinvention, there are certain additional objects hereof, which are ofsignificance. These additional objects include: (a) the provision of amethod and apparatus for burning combustible material in a through to aplurality of openings in the surrounding walls thereof; (c) theprovision of such a method and apparatus wherein the flow of exhaustgases into the secondary combustion area is directed along oppositelyaxially aligned paths and wherein the flowing gas streams meet at apoint within the secondary combustion chamber so that a flame may beintroduced at this point for 'burning the gas streams and any solidifiedmatter thereat; (d) the provision of'such a method and apparatus whichdirects the burnt gases into a plurality of paths throughout thesecondary combustion area and directs the same over a liquid bath andinto the atmosphere through an exhaust stack.

In regard to the specific apparatus for carrying out the prescribedmethods of burning and exhausting com-1 bustion gases from a pluralityof combustion chambers, such apparatus is characterized by: (a) theprovision of a mobile destructor incinerator having primary andsecondary combustion chambers for burning refuse and combustible gasestherein and discharging an exhaust flow substantially free of fly-ashinto the atmosphere; (b) the provision of a mobile destructorincinerator mounted on a wheeled frame which is provided with means forattaching the same to a powdered vehicle; (c) the provision of a mobiledestructor incinerator having an outer enclosure housing and an innercylindrical casing which houses a plurality of compartments therein andwherein the space between the outer housing and the inner casing permitsa cooling flow of air therebetween so as to reduce the temperaturewithin the inner casing; (d) the provision of a mobile destriuctorincinerator having an inner casing and a liquid bath chamber in thebottom portion thereof which chamber is connected by means of conduitsto an ash chamber or pit so that discharge of liquid from the liquidbath chamber may be directed into the ash chamber so as to extinguishburning matter therein and to wash and clean the same; (e) the provisionof a mobile destructor incinerator having a primary combustion areadisposed above a plurality of reciprocally movable grates separating theprimary combustion chamber from an ash chamber or pit and which grateshave control means attached thereto for operation of the same.

In accordance with the present invention, refuse or other combustiblematerial is initially deposited into a primary combustion area and burnttherein. The resultant gas streams are directed around and into asecondary combustion chamber for secondary burning therein. The gasesarethen directed down over a liquid bath for removing any undesirable odorsand fly-ash from the gas streams before exhausting the same into theatmosphere. These are the broad and basic features of the invention, andthe invention itself will be better understood by reference to thefollowing detailed description. Such description makes reference to theaccompanying drawings which present the various embodiments hereof.

In the drawings:

FIGURE 11 is a side elevational view, partially cutaway, of a mobiledestructor incinerator constructed in acordance with one embodiment ofthe invention;

FIGURE 2. is a perspective view of an inner casing of the incineratorembodiment of FIGURE 1 with a diagrammatic showing of the air flowtherein;

FIGURE 3 is a vertical sectional view through the inner casing takenalong the lines 3-3 of FIGURE 2;

FIGURE 4 is a plan view of the inner casing shown in FIGURE 2;

FIGURE 5 is a plan view of the mobile incinerator shown in FIGURE 1;

FIGURE 6 is a fragmentary vertical sectional view through a portion ofthe outer housing of the incinerator and diagrammatically showing thecooling air flow around the inner casing;

FIGURE 7 is a perspective view of another embodiment of mobileincinerator in accordance with the present invention;

FIGURE 8 is a fragmentary side elevational view, partially broken away,showing the rear portion of the embodiment of FIGURE 6;

FIGURE 9 is a sectional view taken along the line 99 of FIGURE 8;

FIGURE 10 is a fragmentary sectional view showing the forward portion ofthe embodiment of FIGURE 6;

FIGURE 11 is a sectional view taken along the line 1111 of FIGURE 10-;

FIGURE 12 is a fragmentary perspective view of the pipe arrangementutilized in the embodiment of FIG- URE 7;

FIGURE 13 is a sectional view, similar to FIGURE 3, but showing theinterior of the inner casingof the embodiment of FIGURE 7, and I FIGURE14 is a fragmentary side elevational view of the slide step unitutilized on the embodiment'of FIG- URE 7.

In the first embodiment of the invention shown in FIGURES 1-6, themobile destruct r, i c e tor is. g nerally designated 2 and comprises anouter housing 6 within which a plurality of combustion areas aredisposed and a mobile supporting frame for supporting the outer housing6. The mobile supporting frame 4 includes a hitch 8 and a front wheelsupport 10. It should be understood however, that the mobile destructorincinerator 2 may also be mounted on a truck chassis and thereby do awaywith the necessity of a hitching device at the forward end thereof. Apair of wheels 12 are journaled on the axle 14 at the rear portion ofthe support frame 4. A longitudinally extending chassis 16 is supportedby the wheels 10 and 12 along with cooperating springs all of which areconventional vehicle body components. A pair of wheel cowlings 18 aresupported on the outer housing 6 above each wheel 12.. Reflecting means20* along with the back-up lights or stop-lights 22 are mounted on therear end of the outer housing 6. The cut-away portion of FIGURE 1 showsa storage compartment 24 Within which propane gas tanks 26, 28, 30* and32 are supported by means of a crib 34. The gas storage tanks areconnected with their conduits at 36 and 38 so that sufiicient gas flowis maintained to the burners 44 and 54, the operation of which will bedescribed below.

At the rear end of the outer housing 6 a pair of charging doors 40' arepivotally mounted on the charging extension 42 of the outer housing. Anoperating gas burner 44, using propane gas fuel and receiving the samefrom the tanks 30 and 32 is provided with a nozzle extending into theprimary combustion chamber 46. By means of a circulator 48 and throughthe conduit 50 propane gas flows from the gas storage tanks to theburner 44 mounted on the rear of the outer housing. As more fullyexplained below, a pair of quick draft units 52 are mounted on the rearwall within the storage compartment 24 as is another gas burner 54 shownin FIGURE 1.

The outer housing '6 supported on the frame 4 encloses a cylindricalinner casing generally designated by the reference numeral 56. The innercasing 56 is provided with a plurality of chambers therein to be morefully described below. The primary combustion chamber 46 is disposedabove a plurality of reciprocally movable grates 58 at the rearward endof the inner casing. The grates are longitudinally movable by means ofthe handles 60*, 62, 64 and 66 protruding rearwardly from the innercasing and through the outer housing so that an operator may manipulatethe grates from the rear end of the incinerator. An ash pitor chambergenerally designated by the reference numeral 68 is disposed in the areabelow the primary combustion chamber and separated by the reciprocallymovable grates 58. This ash pit or chamber 68 extends downwardly belowthe frame 4 and has an inclined surface 70 and access door 72 disposedbelow the outer housing 6 and the frame 4 as more clearly seen inFIGURE 1. In this manner,.it is possible for the fly-ash accumulatedwithin the chamber 68 to be removed therefrom at desirable intervals oftime.

Extending from the upper edge of the ash pit 68 and at the forwardportion of the primary combustion chamber 46 is an upstanding deflectionwall 74 having its edge portions 76 and 78 abutting up against the sidesof the inner casing 56 and terminating in a pair of horizontal sections80 and 82, respectively. The deflection wall 74 then continues upwardlyat the medial portion thereof designated by the reference numeral 84, tothe top of the inner casing 56. By means of the cut-out sections definedby the outer walls of the inner casing, the horizontal surfaces 80 and82, and the vertical surfaces 81 and 83, a pair of passageways areprovided so that the exhaust gases produced in the primary combustionarea 46 may flow therethrough.

As shown in FIGURE 2, the flow paths for the com-- bustion gasesexhausted from the primary combustion area: 46 are designated by aplurality of arrows. A pair of. partition walls 86 and 88 extendforwardly from the (16* flection wall 74 to the rear of the inner casing56 and terminate at the rear wall 90 thereof. These partition walls 86and 88 also extend vertically from the top of the inner casing to thebottom wall 92 thereof. A pair of passageways 94 and 96 are disposed atthe forwardmost and bottom portions of the partition walls 88 and 86,respectively, which permits the exhaust gases from the primarycombustion chamber to pass through the partition walls and into asecondary combust'ion chamber 98. In order to direct the exhaustgas'streams through these passageways 94 and 96 in the partition walls,it is necessary to provide a deflection wall 100 in the pathway 104 anda'deflection wall 102 in the pathway 106 so that the gas streams areevenly directed into the secondary combustion chamber.

As more clearly seen in FIGURE 4, the exhaust gas streams'fro'm theprimary combustion chamber 46 are directed laterally of the pathways 104and 106 along opposite'axially aligned paths and into the secondarycombustion area 'so as to turbulently mix the gas streams at the bottomcentral portion thereof. At this mixing point for the meeting exhaustgas streams another gas burner 54 introduces a flame designated by thearr-ow 110 into the secondary chamber at the bottom central portionthereof so as to further burn the mixed gas streams flowing thereto.In'this' manner, solid matter which was not previously reduced tofly-ash within the primary combustion chamber is here burnt so'as tosubstantially remove all solid matter'from the flowing gas streams andalso to remove undesirable odors therefrom.

' As best shown in FIGURES 3 and 4, the mixed exhaust gas streams'frointhe primary combustion chamber 46 and the gases produced bythe'secondary burning in the secondary combustion chamber 98 willturbulently fiow into the face of a first deflection baflle 112. Thisbaflle'is supported on the floor 92 within the secondary combustionchamber and extends' transversely between the upstanding partition walls86 and 88. Because of the concavity of the face of this deflectionbaffle 112 the mixed gas streams and' exhaust gases are directed upwardly and forwardly as shown by the arrows in FIG- URE 3, into theupper corner99 of the secondary combustion chamber. -As also indicatedby the continuing arrows, the mixed gases will flow downwardly andrearwardly along the top portion of the secondary combustion chamber 98toward the rear thereof. A second deflection baffle 114 depending'fromthe top wall 116 of the inner casing 56 and extending transverselybetween the partition walls 88 and 86 directs the flowing gasesdownwardly and rearwardly through a passageway 118 at the rearward endof the bottom surface 92 Within the secondary combustion chamber. 7

Betweenthelbottom wall 120 of the inner casing 56 and the bottom wall 92of the secondary combustion chamber 98 and the pathways 104 and 106, andextending transversely between the cylindrical surfaces of the innercasing is a chamber 122 in which a liquid 124 is disposed therein. Asseen in FIGURE 3, this chamber 122 extends the full length of the innercasing 56 in the bottom portion thereof and between opposing sideportions. The liquid 124 within this chamber 122 is maintained at alevelwhereby an airspace 126 is created between the bottom of the floor92 and the water level 125. This air space 126 provides a pathway forthe gases entering the chamber 122 through ,the passage 118 in thesecondary combustion chamber 86 and permits the gases to flow over theliquid and forwardly-within the chamber to a pair of outlets 128 at eachside of the chamber 122.

The purpose of passaging exhaust and combustion gases over the liquidbath 124 through the chamber 122 is so that all remaining fly-ashpresent in the gases may settle into the water 124 while the gases passthereover Moreover, remaining undesirable .odors in the gas streams willalso be removed by the'passage of the same over the water bath 124. Theoutlets 128 disposed at the forward end 6 of the chamber 122 communicatewith a pair of draft stacks 130 and 132 extending upwardly from theliquid bath chamber 122 and through the top wall 116 of the inner casing56 terminating at their upper ends 134 and 136, respectively, below thetop portion of the outer housing 6. As best seen in FIGURE 5, the topportion of the outer housing 6 has an expanded metal exhaust screen 138extending from the rear end of the housing to the inner wall of thestorage compartment 24. The expanded metal exhaust screen138 permits theexhaust gases to flow into the atmospherefrom the inner casing 56.

At the forward end of the liquid bath chamber 122, a conduit 140 extendsrearwardly therefrom and enters a valve 142 having a control 144 foropening and closing the valve 142. Extending rearwardly from this valveis another conduit 146 entering the forwardportion of the ash pit orchamber 68. In this manner, at the end of a working schedule, thefly-ash within the pit 68 may be discharged therefrom by means of theliquid flowing from the liquid bath chamber 122 through the conduits andvalve disposed between the liquid bath chamber and the pit 68, while atthe same time any burning matter within the pit 68 is therebyextinguished.

In order to maintain the temperature of the inner casing'within anacceptable range, it is necessary to cool the oter surface of theinnercasing by means of an air flow thereabout. For this purpose an airspace 148 is provided between the outer surface of the inner casing 56and the inside of the outer housing 6. This is best shown in FIGURE 6wherein the arrows indicate the flow path of the cooling air whichenters through the ports 150, 152, and 154 in the bottom portion of theouter housing 6. By means of the air vanes 156, 158, and 162, air isforced into the cooling area 148 while the incinerator is beingtransported from place to place. This cooling air flows around the innercasing within the area 148 and isexhausted through the expandedmetal'screen 138 at the top of the housing 6. In order tomoreefficiently cool "the incinerator and the inner casing, the pair ofquick draft fans 52 are provided and mounted on the forward end wallseparating the air space 148 and'the storage area 24. These quick draftfans 52, as seen in FIGURE 6, circulate an air flow through the airspace 148 as well as serving another purpose to be described below.Accordingly, the forced air draft through'the ports at the bottom of theouter housing combined with the circulating air caused by the draft fans52. sufliciently cools the inner casing so as to maintain the desiredtemperature range therein.

The quick draft fans 52 previously mentioned induce a forced airthroughout the inner casing so that the aforementioned gas streams arepulled from the primary combustion area 46 through the passageways 104and 106 and'into the secondary combustion area 98. The gas streams aredirected in a plurality of turbulent paths through the secondarycombustion area and then directed into and over the liquid within theliquid bath chamber 122 and then exhausted through the stacks 130 and132. In other words, the quick draft fans 52 serve a dualpurpose ofexhausting the combustion gases from the inner casing whilesimultaneously creating a cooling air flow within the air space 148about the inner casing for cooling the same. These quick draft fans 52are of the conventional venturi tube type and do not constitute a partof the present invention.

By means of the movementof the entire mobile destructor incineratorduring its transportation from place to place, the fly-ash in the liquidwithin thechamber 122 is thereby caused to sink to'the bottom thereof tobe later transferred at the end of the working schedule to the ash pitwhere the flowing liquid exti-nguishes any burning in the ashes andfurther cleans and discharges the ash therefrom as previously described.

With the provision of a mobile destructor incinerator utilizing propanegase storage tanks and gas burners 7 within primary and secondarycombustion areas, and with the forced air draft induced by the quickdraft fans throughout the inner casing, it is therefore possible to burngarbage and other material at a sufficiently high rate of speed whichenables the operator to move about through his garbage pick-up schedulewithout returning to the plant for discharge of the burnt ash. Since theburning takes place while the mobile destructor incinerator is beingtransported from place to place, it is not necessary to remain at onelocation in order to first load and then burn the material within theincinerator. Furthermore, through the use of a secondary burning andthrough the use of a liquid bath it is further possible to removesubstantially all solid materials and undesirable odors from the flowingexhaust gas streams so that the exhaust from the incinerator does notbecome a nuisance to home owners, park users and other people who may bewithin the vicinity of the moving incinerator.

Referring now to the second embodiment of the present invention, thereis shown in FIGURE 7 a larger and somewhat modified form of mobileincinerator generally designated 200. The incinerator 200 includes anouter casing 202 mounted upon a suitable vehicular frame carrying fourwheels 204. The casing may be provided with a pair of fenders 206extending across the wheels. The forward portion of the incineratorforms an equipment room to which access may be gained by a door 208. Onthe sides at the rear of the vehicle, riding steps are provided topermit personnel to be carried by the vehicle while the same is beingpulled. A fixed riding step 210 may be provided at one side of thevehicle, and a slidable step 212 may be provided at the opposite sidethereof. As shown in FIGURE 14, the slide step 212 may be moved betweenan extended position, shown in dashed lines, which permits someone tostand thereon, and a recessed position whereat the step is slid underthe housing 202. A handle 214 can be provided on the rear of the housingso that an operator may hold the same while he rides on the slide step212. Also, a signal button 216 may be provided on the casing, suchbutton being useful to permit an electrical signal to be sent from therear of the incinerator to the cab of the vehicle towing theincinerator, thereby indicating to the driver that he should eithercommence or terminate towing.

Just as in the initially described embodiment, there is provided withinthe outer casing 202, an inner casing 218 which is spaced inwardlysufficiently from the walls of the outer casing 202 to establish an airspace therebetween. At the rear end of the housing, a pair of hingedcharging doors 220 are provided, with a hinged baflle 222 hangingdownwardly inside such d-oors. Inside the housing adjacent the doors220, there is provided a primary combustion chamber generally designated224 and having grate members 226, slidably mounted therein in the samemanner as previously described in connection with FIGURE 2. An ash pit228 is provided beneath the grates 226, to accomplish the purposespreviously set forth in connection with the initial embodiment hereof.Somewhat centrally of the incinerator 200, in upstanding relationshipinteriorly of the inner casing 218, there is provided a divider ordeflection wall 230 which serves to set off the primary combustionchamber 224 from a secondary combustion chamber generally designated 232which is disposed between the deflection wall and the equipment room.

To more fully appreciate the construction and significance of theprimary combustion chamber 224, reference is made to FIGURES 8 and 9wherein it can be seen that the grates 226 are provided with handles 234which may be manipulated by the incinerator operator. The side walls ofthe primary combustion chamber 224 are formed as corrugated bafiles 226,fabricated of stainless steel or other similar material which willwithstand the heat of combustion within the chamber. These combustionwalls 236 are spaced somewhat inwardly from the walls of the innercasing 218 to thus Provide a narrow passageway 238 therebetween. Beneaththe inner casing 218, a depending insulation wall 240 extends downwardlyto the frame of the vehicle, thus continuing the passageway 238 to aposition spaced just above the ground. Ambient air for combustion isdrawn inwardly from the bottom of the incinerator, and such ai-r passesupwardly through the passageways 238 on opposite sides of the primarycombustion chamber 224. As such air passes the walls 236, it ispre-heated by radiation from such walls, and such pre-heating therebyassures improved combustion within the primary chamber 224.Additionally, a pair of blower fans may be provide in spaced housings242 on opposite sides of the doors 220, and an interconnecting conduit244 may extend between such housings. The blower fans can aid ininducing a flow of ambient air into the primary combustion chamber. Anoperating gas burner may be provided in one or both of the housings 242,with such burner means having a nozzle 246 extending into the primarycombustion chamher, as shown in FIGURE 8. Liquid propane gas is suppliedfrom a source there-of, to be presently described, and passes throughlines 250 shown in FIGURE 7, to be supplied to the burners and to passthrough the nozzle 246 into the primary combustionchamber. The admixtureof such liquid propane gas and pre-heated air in the primary combustionchamber 224 creates a combustion supporting atmosphere therewithin whichenables the garbage and trash introduced through the charging doors 220to be burned. Such burning. takes place upon the grates 226 and theashes and residue then drop through such grates into the ash pit 228.The ash pit is provided with a slidably removable bottom 252 which canbe manually extended at .periodic intervals to allow the ash residue todrop into the street or onto a dumping area. If such ash residue dropsinto the street, it can be manually picked up and placed within thetruck or towing vehicle which pulls the incinerator 200.

The deflection wall 230 in the embodiment of FIG- URES 7-14 isessentially the same as the deflection wall 74 previously described inthat it has an upstanding central section 254 which extends to the topof the inner casing 218, and a pair of laterally extending shoulders256, 256 extending sidewardly from the central section 254 to merge intothe side walls of the inner casing 218. The space between the shoulders256 and the interior of the casing 218 thus set-s off a pair of spacedpassageways 258, 258 extending longitudinally of'the incinerator onopposite sides of the central wall section 254. The exhaust gases fromthe primary combustion chamber 224 pass into these passageways 258 andadditionally, a certain amount of the preheated air from the passageway238 passes thereinto. To aid in the mixing of these primary combustiongases, with the preheated air, a pair of baflle members are provided,each baffle member being a plate 260 extending angularly forward fromthe shoulder 256 and having a plurality of apertures 262 therein. Sideor partition walls 264, 264 extend forwardly from the edges of thecentral portion 254 on the deflection wall, to thereby establishtherebetween, the secondary combustion chamber 232.

The interior of the secondary combustion chamber 232, as can best beseenfrom FIGURE 13, corresponds substantially to the configurationpreviously described in connection with FIGURE 3 relating to the initialembodiment of invention. That is, the top of the secondary combustionchamber is formed by the top wall of the inner casing 218, the rear wallof the secondary combustion chamber is formed by the deflection wall230, and the forward wall of the secondary combustion chamber is formedby a wall 266. Openings 270 are provided in each of the side walls 264whereby the divided exhaust gas streams flowing through the passageways258 may be directed into the secondary combustion chamber 232 by meansof upstanding deflection walls 272, as shown in FIGURE 7, and beingsimilar to the walls 100, 102 previously described. Within the secondarycombustion chamber, a bottom or base Wall 276 is provided with a firstarcuately formed deflection bafile 278, similar to the bafile 112 of thepreviously described embodiment. A second arcuately formed deflectionbaffle 280, similar to the previously described baflie 114, depends fromthe upper Wall of the inner casing 218. The gas streams in the secondarycombustion chamber 232 are turbulently directed, as shown by the arrows,and as previously de scribed in the initial embodiment, and are directeddownwardly to the passageway 282 between the base wall 276 and thedeflection wall 230.

The passageway 282 leads to a main liquid bath or reservoir generallydesignated284 which exists beneath the secondary combustion chamber andwhich carries therewithin a supply of water or other suitable liquid286. The purpose for passing the gases from the secondary combustionchamber over and across the liquid bath 284, is to assure that allremaining fly ash present in the gases will settle into the water 286within the bath. Baflle means 288 can depend from the underside of thebase wall 276 and into the bath 284 to be assured that the gases followa somewhat tortuous path while passing through the bath, therebyassuring that undesirable odors will likewise be removed from theexhaust gases. One or more upstanding draft stacks 290 are provided atthe forward end of the bath 284, whereby the gases which have passedacross the bath can exit upwardly through such stacks.

As shown in FIGURE 7, the top of the outer housing 202 isopen, and isprovided with a plurality of s'idewardly or laterally extending louversor baffles. The louvers 292 at the forward portion of the incineratorare directed angularly rearwardly while the bafiles 294 at the rear-Ward portion of the incinerator are directed angularly forwardly. Aswill be seen, the draft stack or stacks 290 terminate beneath thebaffles 292, and thus the gases exhausting from such stacks pass throughthe louvers 292 and are directed rearwardly, particularly when theincinerator is moving in a forward direction, as is usual when theincinerator is being pulled by a towing vehicle. Similarly, because ofthe forwardly disposed relation of the louvers 294, towing of theincinerator causes cooling air to enter inwardly through such louversand to pass around the sides of the inner casing 218, thereby serving tocool the same. At the very forward portion of the incinerator, above theequipment room, no louvers are provided, and instead, a sloped solidwall portion 296 is provided. This wall portion, as can be seen fromFIGURES 7 and 10, slopes upwardly and terminates in an upstanding lip298. Thus, as the incinerator 200 is towed in a forward direction, thecoaction of the sloped wall 296 and the lip 298 serve to assure that theambient air will not pass directly across the louvers 292 and 294, butinstead, will be directed somewhat upwardly to pass over theincinerator. In this manner, it is virtually assured that the exhaustgases exiting through the louvers 292 will not be re-directed backthrough the louvers 294.

In the forward portion of the incinerator, i.e., the equipment room, thesupply of liquid propane gas is maintained in a large tank 300 locatedwithin a chamber 302. A generator 304 is located above this room 302 andlouvers 306 in the forward wall of the incinerator permit cooling air topass across the generator. An opening 308 is formed beneath thegenerator 304 to communicate with the chamber 302, to thereby heat theatmosphere therebetween, thus assuring better vaporization of the gas inthe tank 300. Additionally, if desired, a separate coil heater may beutilized in conjunction with the tank 300. Another chamber 310 isprovided at one side of the equipment room, such chamber having theincinerator radiator 312 therein, which radiator communicates with theatmosphere via louvers 314 in the outer 10 casing 202. A fan 316 isprovided behind the radiator 312 to draw the air inwardly through thelouvers 314 for cooling purposes. An additional draft fan 318 may beprovided in the equipment room to ventilate the same through louvers inthe door 208.

In contrast to the initial embodiment of invention wherein all of theliquid or water for the bath was car ried directly therewithin, andwherein such water had to be periodically refurnished from a firehydrant or the like, this embodiment of invention carries a pair ofauxil iary water tanks 320, 320, disposed along the sides of theinnercasing 218 as shown in FIGURE 9. These water tanks 320 are alsodisposed along the sides of the main bath 284, as can best be seen inFIGURE 12. The piping system keeps the water from the tanks 320 inconstant circulation with the water in the tank 284, thereby permittingthe water tanks 320 to actually act as water jackets which provide acooling effect along the sides of the combustion chamber. To this end, aline or conduit 322 extends between the side tanks 320 and connects to acentral pipe 324 which in turn connects toa line 326 having a portion328 which takes water inwardly from the main bath 284. A branch line 330leads from the line 326 to a water pump and motor 332 which operates tokeep the water in constant circulation. Another branch line 334 connectsthe pump 332 back to the line 326, thereby permitting the desiredcirculatory effect. An additional branch line 336 extends into the tank284 and to a spray head 338, shown in FIGURES 10,12 and 13. This sprayhead 338 provides a spray of water in the space in the main bath abovethe liquid level 286, and the exhaust gases exiting from the bath 284must pass through this spray thereby giving such gases even anadditionalwetting treatment. A flow switch 340 may be provided in theline 334 to act as a sensor for determining whether there is continuousWater flow through the piping system. If, due to failure of the pump332, clogging of the pipes, or some other similar defect, the watershould fail to properly circulate, this flow switch 340 ac tivates analarm system to indicate to the operator that the unit is notfunctioning properly. Overflow pipes 342, 342 extend from the side tanks320 to the main bath 284. Thus, as the pump 332 operates, it draws water286 inwardly from the main bath via the intake 328. Most of such Wateris transferred through the lines 334, 322 and into the side water tanks320, from which such water can exit through the overflow pipes 342 to bereturned to the main bath 284. In this manner, the water is constantlykept in circulation and thereby serves to provide a cooling effect forthe combustion chambers. A certain amount of the water being circulatedis passed through the line 336 to the spray head 338, for the purposepreviously described.

As an additional feature, a thermocouple 344 is provided in the forwardwall 266 of the secondary cornbustion chamber. This thermocouple iselectrically connected to sense the heat in the secondary combustionchamber 232, and when such heat reaches approximately 1400 F. theburners in the primary combustion chamber are automatically cut off,since the heat therein will be high enough to assure spontaneouscombustion therewithin.

As shown in FIGURE 13, the bath 284 .inay be connected to the ash pit228 by means of a conduit 34 6 having a valve 348 therein. This issimilar to the arrangement described in connection with FIGURE 3, andaccomplishes the same purpose, namely, to permit selective transfer ofwater 286 from the main bath to the ash pit for washing the same.

Before discussing the operation of the second embodiment hereof, it willbe apparent that in this embodiment, as well as the embodiment initiallydescribed, mobility of the incinerator is one of the features whichenables accomplishment of the objects of the present invention.Accordingly, to this end, it is customary to form the incinerator 200 asa separate trailer unit which can be attached to any suitable towingvehicle by means of a hitch, such as the hitch 350 shown in FIGURE 10.Preferably, the towing vehicle will be in the form of a truck which canitself collect and carry the burnt refuse from the ash pit 228.

Although the opeartion of this second embodiment of invention issubstantially the same as that of the initial embodiment, and althoughsuch opeartion shoud be somewhat apparent from the detailed descriptionset forth hereinbefore, such operation will again be herein described ina brief manner, to assure an understanding of the novel and importantaspects of the present invention. Let it be assumed that the incinerator200 is operating and that the same is being towed by an automotivevehicle from one location to another. When the vehicle reaches thesecond location, whereat the garbage and refuse to be burnt are located,the towing vehicle stops and the operator opens the charging doors 220at the rear of the incinerator. A conventional switch means is providedon the doors, whereby when such doors are opened, the flow of gasthrough the lines 250 is terminated, for safety purposes. The refuse orgarbage is then introduced through the doors into the primary combustionchamber 224 to rest upon the grates 226 therewithin. The hanging baffle222 serves to assure that bottles, aerosol cans, or other explodableitems previously introduced into the combustion chamber, cannot explodeand cause any harm to the operator, When the trash has been successfullyloaded into the primary combustion chamber, the opeartor closes thedoors, climbs upon the slide step 212, and pushes the button 216,thereby signaling the operator of the towing vehicle that the loadingoperation has been completed and that the incinerator can again be movedto the next location. Ambient air is drawn inwardly through thepassageways 238, wherein it is pre-heated by radiation from the primarycombustion chamber. A portion of this pre-heated air passes into theprimary combustion chamber, along with liquid propane gas supplied fromthe tank 300. A gas burner 246 ignites the combustible mixture withinthe primary combustion chamber, thereby causing refuse to be burnttherewithin. The ashes and solid residue from such combustion dropthrough the grates 226 and into the ash pit 22-8. Meanwhile the exhaustgases from the primary combustion chamber, which carry a certain amountof fly-ash entrained therein, are divided by the deflection wall 236)into a pair of separated streams flowing through the passageway 258. Thebaflles 260 within these passageways mix the remainder of the pre-heatedair with these exhaust streams, and the mixed stream then flows fowardlyto the deflection walls 272 which direct the mixed gas stream inwardlythrough the openings 270 and into the secondary combustion chamber 232.A secondary gas burner 352 is provided at the forward end of thesecondary combustion chamber, and is connected by a line 354 to the gastank 3%. This burner 35'2 creates a secondary burning action within thechamber 232 to thus burn the solid fly-ash and other matter entrainedwithin the mixed gas stream. The ba-files 2-78 and 280 cause the mixedgas stream to flow turbulently about within the secondary combustionchamber, thereby assuring a complete secondary burning operation.

Once the gases have been burned within the secondary combustion chamber,they pass through the passageway 282 to the main bath 284 having aliquid such as water 286 disposed therewithin. As the gases pass acrossthe surface of this water 286 any remaining fly-ash present therein willsettle into the water, and additionally, the water will serve to removeany objectionable odors present in the gas stream. The gases passforwardly through the bath 284 toward draft stack means 290, with thebafile 28 2 assuring that such flow will be tortuous rather than direct.As the gases flow to the draft stack means 299, they pass through aspray from the spray head 338, which provides a further wetting actionto assure that no fiy-ash or solid matter remains within the gases. Thethen purified gases exit upwardly through the draft stack 290 anddischarge throughthe louvers 292 at the top of the unit.

Among the features which enable the instant invention to operate in itshighly eflicient manner, is the provision of the incoming ambient airpassing through the passageways 23b, and thereby being pre-heated toassure better initial combustion in the primary combustion chamber.Also, the reverse angular disposition of the louvers 2W4 at the top ofthe unit assures that cooling air will be drawn inwardly to pass betweenthe inner and outer casings. Moreover, the provision of the side watertanks 320 serves to provide cooling water jackets which absorb the heatof the combustion, and the piping system and circulating means assurethat the water, both within the side tanks and main tank, are inconstant circulation. An audible or visible alarm system is linked withthis water circulating system to thus provide an indication to theoperator in the event that the water circulating system should fail forsome reason. To assure better vaporization of the liquid propane gas, acoil heater can be provided for the tank 30%, and auxiliary heating canbe accomplished by means of indrawn air passing over the generator 304.The generator itself exhausts through a pipe 3-56 in the rear of the lip298, so that such exhaust is not directed into the equipment room of theunit. An even further additional heating effect for the tank 300 may beprovided by the radiator 312 which heats the air passing thereacrossfrom the adjustable louvers 314, Also, the thermocuple means 344 servesto coil and control combustion in the primary combustion chamberresponsively to the temperature in the secondary combustion chamber.

After reading the foregoing detailed description it will be apparentthat the objects set forth at the outset of the specification have beensuccessfully achieved by the present invention. Accordingly,

What is claimed is:

1. A method of burning combustible components entrained in an exhaustgas fiow from a combustion chamber, said method comprising the steps of:

(a) directing said exhaust gas flow into separate gas streams flowingalong opposite sides of a given area;

(b) directing said gas streams into said area along opposite axiallyaligned paths such that said gas streams turbulently mix at a givenlocation in the lower portion of said area;

(c) subjecting said mixed gas streams to flame at said given location;

(d) directing the mixed gas stream rearwardly in said area and thenforwardly into an upper portion of said area;

(e) re-directing the mixed gas streams rearwardly in the upper portionof said area, and then,

(f) directing the mixed gas streams downwardly below said area and overa body of liquid.

2. A method of burning refuse in a first combustion area and exhaustingcombustion gases produced by said burning, said method comprising thesteps of:

(a) directing the combustion gases upwardly and forwardly of said firstcombustion area and into a plurality of gas streams flowing on oppositesides of a second combustion area;

(b) directing said gas streams on each side of said second combustionarea downwardly and inwardly into said second combustion area so thatsaid gas streams are flowing in opposite axially aligned paths;

(c) mixing said gas streams at a given location within said secondcombustion area;

(d) burning the mixed gas streams at said given location Within saidsecond combustion chamber so as to remove substantially all of the smokeand combustible particles therein;

(e) directing the mixed gas streams and combustion gases produced bysaid burning rearwardly, upwardly and forwardly in said secondcombustion area;

('f) redirecting said mixed gas streams and the combustion gases fromsaid burning rearwardly in said second combustion area;

(g) directing said mixed gas streams and said combustion gasesdownwardly and below said second combustion area into a washer area;

(h) passing said mixed gas streams and said combustion gases forwardlyover a liquid so as to substantially remove all remaining ash in saidgas streams, and

(i) directing said ash-free gas streams into the atmosphere.

3. A mobile destructor incinerator for burning refuse therein anddischarging combustible gases therefrom comprising:

(a) a wheeled supporting frame;

(b) an outer housing;

(c) an inner casing spaced from said outer housing so as to permit acooling air flow between the inner side of said outer housing and theouter side of said inner casing;

(d) first gas burner means mounted on said outer housing having a nozzledisposed within said inner casing;

(e) a first combustion area within said inner casing for burning refusetherein by means of said first gas burner means; t. i

(f) a refuse charging passageway in said outer housing communicatingwith said first combustion chamber and having door means thereon foropening and closing said passageway;

(g) a first upstanding deflection wall disposed forwardly of said firstcombustion chamber-and opposite saidrefuse charging. passageway,

' .(1)'.outlets in said first deflection Wall for permitting thecombustion gases produced in said first combustion chamber-by said firstgas burner means to flow therefrom; I

(h) a second combustion chamber having a second gas burner associatedtherewith for removing smoke and odors from said combustion gasesproduced in said first combustion chamber; j

(i) means for directing the flow of combustion gases between said firstand said second combustion chamber;

(j) first bafile means in said second combustion chamber for directingthe combustion gases upwardly and forwardly therefrom;

(k) second baffle means for directing said combustion gases downwardlyand-rearwardly therefrom;

(l) washer means underlying said second combustion chamber, 7 i

(1) inlet means communicating with said second combustion chamber forpermitting said combustion gases to flow from said second combustionchamber and over said washer means,

i (2) outlet means in said washer means disposed forwardly of said inletmeans;

(in) means associated with said first and second combustion chambers-andsaid washer means to induce a draft throughout said inner casingso as tocreate saidfiow of com-bustion gases. i 4. A mobile destructorincinerator comprising:

(a) a longitudinally extending support frame having wheel means thereon;

(b) an outer housing mounted on said frame;

(c) an inner casing supported within said outer housing and having thewalls thereof spaced inwardly from the inner surface of said outerhousing so as to provide a cooling chamber therebetween;

(d) charging doors pivotally supported on the rear of said outerhousing;

(e) a primary combustion chamber'disposed at rearward end of said innercasing,

(1) said primary combustion chamber including a plurality of gratesremovably disposed at the bottom thereof;

(2) an ash pit disposed below said grates for collecting the ashproduced during combustion;

(f) an upstanding deflection wall at the forwardmost portion of saidprimary combustion chamber;

(1) said deflection wall comprising a pair of cutout sections;

(g) a pair of longitudinally extending upstanding partions disposedbetween said upstanding deflection wall and the forward end of saidinner casing, said partitions being spaced'inwardly of said cut-outsections in said upstanding deflection wall;

(1) said partitions defining a first and second flow path between eachpartition and the inner surface of said inner casing, and a secondarycombustion chamber between said partitions;

(2) each of said partitions having a cut-outportion providing apassageway between said secondary. combustion chamber and said first andsecondflow paths;

(h) a water chamber'disposed below' said first and second flow paths andsaid secondary combustion chamber; V

(1) said Water chamber having an inlet communicating with, saidsecondary combustion chamber and a plurality of outlets communicatingwith the atmosphere, and" (i) means supported on said frame for creatinga draft throughout said inner casing so as to induce said gas flows. H I5. The mobile destructor incinerator defined in claim 4 furtherincluding;

(a) conduit means connecting said water chamber and said ash chamber;

(b) valve means in said conduit between saidwater chamber and said ashchamber for alternatively directing a water flow into said ash chamberfor cleaning the same or out of said water chamber and through saidouter housing so as to empty said water chamber.

6. A mobile incinerator unit comprising:

(a) first enclosure means defining therewithin a primary combustionchamber;

(b) means communicating with said primary combustion chamber and beingmovable betweenan open position which permits said primary combustionchamber to be charged with contents to be incinerated and a closedposition which prevents such charging;

(0) second enclosure means juxtaposed to said first enclosure means anddefining therewithin a secondary combustion chamber;

((1) means for directing the exhaust gas stream from said primarycombustion chamber into said secondary combustion chamber for effectinga secondary burning of said exhaust gas stream;

(e) liquid reservoir means communicating with said secondary combustionchamber for receiving the exhaust gas stream therefrom and forpermitting such exhaust gas stream to pass therethrough;

(f) exhaust means coupled to said liquid reservoir means whereby exhaustgases exiting from said reservoir means can discharge from the unit;

(g) a pair of side liquid tanks disposed on opposite sides of saidsecond enclosure means; and

(h) hydraulic circuit means interconnecting said side liquid tanks tosaid liquid reservoir means.

7. A mobile incinerator unit as defined in claim 6,

the

15 wherein said first enclosure means has grate means in the basethereof.

8. A mobile incinerator unit as defined in claim 7, wherein said firstenclosure means further includes an ash receiving housing disposedbeneath said grate means for receiving ashes from the incineratedcontents of said primary combustion chamber.

9. A mobile incinerator unit as defined in claim 8, werein said ashreceiving housing includes a removable bottom wall for emptying theashes therefrom.

10. A mobile incinerator unit as defined in claim 6 wherein said liquidreservoir means includes baflle means which prevent the gas streamtherewithin from passing directly to said exhaust means.

11. A mobile incinerator unit as defined in claim 6 wherein saidhydraulic circuit means includes pump means for keeping said liquid incirculation between said side tanks and said reservoir means, therebypermitting said liquid to provide a cooling effect for said secondenclosure means.

12. A mobile incinerator unit as defined in claim 11 wherein saidhydraulic circuit means further includes a flow sensing means and analarm means coupled thereto whereby said flow sensing means will operatesaid alarm means if liquid circulation terminates.

13. A mobile incinerator unit comprising:

(a) first enclosure means defining therewithin a primary combustionchamber;

(b) means communicating with said primary combustion chamber and beingmovable between an open position which permits said primary combustionchamber to be charged with contents to be incinerated and a closedposition which prevents such charging;

(c) second enclosure means juxtaposed to said first enclosure means anddefining therewithin a secondary combustion chamber;

(d) means for directing the exhaust gas said primary combustion chamberinto ary combustion chamber for effecting burning of said exhaust gasstream;

(e) liquid reservoir means communicating with said secondary combustionchamber for receiving the exhaust gas stream therefrom and forpermitting such exhaust gas stream to pass therethrough;

(f) exhaust means coupled to said liquid reservoir means whereby exhaustgases exiting from said reservoir means can discharge from the unit;

(g) said first enclosure means including passageway means at leastpartially surrounding said primary combustion chamber and communicatingwith the atmosphere to admit ambient air to said primary combustionchamber;

(h) said means for directing said exhaust gas stream including wallmeans juxtaposed to said second enclosure means and having interruptedportions therein to cause said primary combustion chamber exhaust gasesto divide into a pair of streams which flow along opposite sides of said.second enclosure means;

(i) said wall means including bafiie means at said interrupted portionsfor admixing at least a portion of said ambient air with said primarycombustion chamber exhaust gases.

14. A mobile incinerator unit as defined in claim 13 wherein said secondenclosure means has at least one opening in each side thereofcommunicating with said secondary combustion chamber and has adeflection wall juxtaposed to each such opening to direct the gasstreams flowing along the sides of said second enclosure means throughsaid openings and into said secondary combustion chamber.

15. A mobile incinerator as defined in claim 13 wherein said exhaustmeans includes at least one upstanding draft stack communicating withthe atmosphere.

16. A mobile incinerator unit as defined in claim 15 stream from saidseconda secondary 16 wherein said exhaust means further includesangularly directed louvers disposed adjacent the outlet of said draftstack for directing the exhausting gases in a given direction oppositeto the direction of normal forward movement of said unit.

17. A mobile incinerator unit as defined in claim 16 further includingadditional louvers juxtaposed to said louvers and angularly directedoppositely to said given direction, said additional louvers serving todraw atmospheric air into said unit during forward movement thereof, forcooling of said unit.

18. A mobile incinerator unit comprising:

housing means;

ground engaging wheel means coupled with said housing means to enablethe same to be readily transported;

first enclosure means within said housing meansdefining a primarycombustion chamber; second enclosure means within said housing meansjuxtaposed to said first enclosure means and defining a secondarycombustion chamber;

means for charging said primary combustion chamber wtih contents to beincinerated, such incineration producing an exhaust gas stream; saidsecond enclosure means including a top wall means, a bottom wall meansand side walls which serve to define said secondary combustion chamber;

said side walls being spaced from said housing means to definepassageway means;

said side walls having inlet opening means therein communicating theinterior of said secondary combustion chamber with said passagewaymeans;

said exhaust gas stream flowing from said primary combustion chamber,through said passageway means and into said secondary combustionchamber; liquid bath means disposed beneath said second enclosure meanswhereby said second enclosure means bottom Wall means forms the topboundary of said liquid bath means; said liquid in said liquid bathmeans being at a level which is spaced slightly beneath said bottom wallmeans to thereby provide a flow space between the surface of said liquidand said bottom wall means; ignition means communicating with theinterior of said secondary combustion chamber for burning the ex- Ihaust gast stream introduced thereinto;

said bottom wall means including an outlet opening means communicatingwith said liquid bath means whereby the burnt exhaust gas stream fromsaid secondary combustion chamber can pass through said outlet openingmeans and along said flow space, thereby at least partially contactingthe liquid in said bath means to wash said burnt exhaust gas stream;and,

exhaust means communicating between the atmosphere and said flow spaceto exhaust said washed gas stream to the atmosphere.

19. A mobile incinerator unit as defined in claim 18, wherein saidbottom wall means includes depending baffie means extending at leastpartially into said flow space to cause the gas stream flowingtherethrough to follow a tortuous path.

20. A mobile incinerator unit as defined in claim 18, wherein saidbottom wall means-includes an upwardly extending baffle to cause saidintroduced exhaust gas stream to flow upwardly toward said top wallmeans, and wherein said top wall means includes a downwardly extendingbaflie to cause said burnt exhaust gas stream to exit through saidoutlet opening means.

21. A mobile incinerator unit as defined in claim 18 further includingburner means in said primary and secondary combustion chambers and asupply of com bustible material connected with said burner means.

22. A mobile incinerator unit as defined in claim 21 includingthermocouple means in said secondary com- 17 bustion chamber, coupled tosaid burner means in said primary combustion chamber to interruptoperation thereof when said secondary combustion chamber reaches apredetermined temperature.

References Cited by the Examiner UNITED STATES PATENTS 110,664 1/1871Martin 126--79 X 954,855 4/1910 Decarie 1108 X 1,012,215 12/1911 Moore110-169 1,096,105 5/1914 Gong 126172 X 1,156,398 10/1915 Fischer.1,533,686 4/1925 Balmer 110-8 2/1931 Brown 11022 3/1935 Van Denberg110-8 7/1950 Gregg et a1. 11018 11/1960 Coleman 1108 5/1961 Brandt eta1. 11018 7/1962 Hebert 1108 FOREIGN PATENTS 8/ 1914 France. 2/ 1952Great Britain.

FREDERICK L. MATTESON, JR., Primary Examiner.

H. B. RAMEY, Assistant Examiner,

13. A MOBILE INCINERATOR UNIT COMPRISING: (A) FIRST ENCLOSURE MEANSDEFINING THEREWITHIN A PRIMARY COMBUSTION CHAMBER; (B) MEANSCOMMUNICATING WITH SAID PRIMARY COMBUSTION CHAMBER AND BEING MOVABLEBETWEEN AN OPEN POSITION WHICH PERMITS SAID PRIMARY COMBUSTION CHAMBERTO BE CHARGED WITH CONTENTS TO BE INCINERATED AND A CLOSED POSITIONWHICH PREVENTS SUCH CHARGING; (C) SECOND ENCLOSURE MEANS JUXTAPOSED TOSAID FIRST ENCLOSURE MEANS AND DEFINING THEREWITHIN A SECONDARYCOMBUSTION CHAMBER; (D) MEANS FOR DIRECTING THE EXHAUST GAS STREAM FROMSAID PRIMARY COMBUSTION CHAMBER INTO SAID SECONDARY COMBUSTION CHAMBERFOR EFFECTING A SECONDARY BURNING OF SAID EXHAUST GAS STREAM; (E) LIQUIDRESERVOIR MEANS COMMUNICATING WITH SAID SECONDARY COMBUSTION CHAMBER FORRECEIVING THE EXHAUST GAS STREAM THEREFROM AND FOR PERMITTING SUCHEXHAUST GAS STREAM TO PASS THERETHROUGH; (F) EXHAUST MEANS COUPLED TOSAID LIQUID RESERVOIR MEANS WHEREBY EXHAUST GASES EXITING FROM SAIDRESERVOIR MEANS CAN DISCHARGE FROM THE UNIT; (G) SAID FIRST ENCLOSUREMEANS INCLUDING PASSAGEWAY MEANS AT LEAST PARTIALLY SURROUNDING SAIDPRIMARY COMBUSTION CHAMBER AND COMMUNICATING WITH THE ATMOSPHERE TOADMIT AMBIENT AIR TO SAID PRIMARY COMBUSTION CHAMBER; (H) SAID MEANS FORDIRECTING SAID EXHAUST GAS STREAM INCLUDING WALL MEANS JUXTAPOSED TOSAID SECOND ENCLOSURE MEANS AND HAVING INTERRUPTED PORTIONS THEREIN TOCAUSE SAID PRIMARY COMBUSTION CHAMBER EXHAUST GASES TO DIVIDE INTO APAIR OF STREAMS WHICH FLOW ALONG OPPOSITE SIDES OF SAID SECOND ENCLOSUREMEANS; (I) SAID WALL MEANS INCLUDING BAFFLE MEANS AT SAID INTERRUPTEDPORTIONS FOR ADMIXING AT LEAST A PORTION OF SAID AMBIENT AIR WITH SAIDPRIMARY COMBUSTION CHAMBER EXHAUST GASES.